Bibliographic record and links to related information available from the Library of Congress catalog.
Note: Contents data are machine generated based on pre-publication provided by the publisher. Contents may have variations from the printed book or be incomplete or contain other coding.
Contents About Tunnels 4 Tunnels in the Past 6 Types of Tunnel 8 Shapes and Structures 10 Tunnel Materials 12 Designing a Tunnel 14 Site Preparation 16 Boring in Soft Ground 18 Digging into Rock 20 Ready-made Tunnels 22 Tunnels in Use 24 Tunnel Disasters 26 Tunnel Facts 28 Glossary 30 More Books to Read 31 Index 32 Some words are shown in bold, like this. You can find out what they mean by looking in the glossary.
Library of Congress Subject Headings for this publication:
Tunnels -- Juvenile literature.
Tunneling -- Juvenile literature.